Originally Posted by BLND1
Originally Posted by edyvw
Originally Posted by nicholas
I was thinking the 5w-40 would hold up better for the long highway drives we have planned this summer. 16+ hours of straight driving in summer weather.
Perhaps provide better protection for the turbo bearing.
Which is EASIEST road condition your car will ever see. You can run anything in those conditions, your engine will be fine.
Do not go too thick in an engine that is not recommended for it. Thick oil generates more heat too. Get Castrol Edge 0W30 ACEA A3/B4, or Castrol 5W30 ACEA A3/B4. Mobil1 ESP 5W30, Pennzoil 0W30 LX etc. basically any 0/5W30 oil that has these specifications: ACEA A3/B3 B4, and is approved for MB 229.5 OR ACEA C3 and it is approved to MB 229.51 or MB 229.52 or VW 504.00/507.00. Pennzoil Platinum Euro 5W30 is super easy to find here in the US in Wal Mart.
All these "Euro" 0/5W30 are very thick W30 oils on verge to be W40 oils.
But again, driving 16hrs on hwy is best thing that can happen to an engine.
His car specs an optional Xw - 40 - and rumors are that that should be the go-to anyway with all of the Hyundai theta II engine family issues.
And many W40 have same HTHS with some W30 "Euro" oils. IMO< best oil for any turbo engine would be Castrol Edge 0W30 (I just got case while it was on sale on Amazon). HTHS of 3,58 (For example Motul X-Clean 5W40 has HTHS of 3.64, or Mobil1 0W40 FS has HTHS of 3.6). It is not grade, it is HTHS that matters, and all ACEA A3 or C3 oils will have HTHS above 3.5.